#!/bin/bash
#simple script menu

function diskspace {
 clear 
 df -k
}

function whoseon {
 clear
 who
}

function memusage {
 clear
 cat /proc/meminfo
}

PS3="Enter option: "
select option in "Display disk space" "Display logged on users" "Display memory usage" "Exit program"
do
  case $option in
  "Exit program")
        break ;;
  "Display disk space")
        diskspace ;;
  "Display logged on users")
        whoseon ;; 
  "Display memory usage")
        memusage ;;
   *)
     clear
     echo "Sorry.wrong selection"
   esac

done
clear